Cy Twombly : An exhibition of drawings by one of the best-known and polarizing American artists of the past 50 years opens 6:30-8:30 p.m. Thursday at the Menil Collection, 1515 Sul Ross; 713-525-9400.

On the Razzle :Tom Stoppard's adaptation of the 19th-century farce by Johann Nestroy that inspired Thornton Wilder's The Matchmaker, about two mischievous clerks who escape for a spree in Vienna. 7:30 p.m. Thursdays, 8 p.m. Fridays-Saturdays, 3 p.m. Sundays, through June 5. Main Street Theater, 2540 Times; 713-524-6706.